Polyacetal
[化] 聚缩醛
🗣️ 情景例句
I suppose so.
我想是这样吧。
Stop blabbering!
别唠唠叨叨了！
He could not wash himself or get dressed.Instead, his sister or his parents had to help him.
他自己不能洗澡或穿衣服，他的姐姐或父母亲就只好帮他的忙。